Indicates the number of financing receivables under each classification.

No definition available.

Name:	aig_FinancingReceivableNumberOfLoans
Namespace Prefix:	aig_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

+ Details

Name:	srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage, before allowance for credit loss, of financing receivable to total financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

+ Details

Name:	srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent
Namespace Prefix:	srt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=aig_FinancialAssetLessThanOrEqualTo90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=aig_FinancialAssetGreaterThan90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_ApartmentBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_IndustrialPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_HotelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=aig_OtherFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Lending Activities - Credit Quality Performance Indicators for Commercial Mortgages (Details) $ in Millions	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit losses	$ 37,800	$ 37,776	$ 117	$ 134
Commercial mortgage loans
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	190	213
Total	$ 3,305	$ 3,836
Allowance for credit losses	$ 163	$ 138	$ 109	$ 123
Percent of Total	100.00%	100.00%
Percentage of total, allowance for credit losses	5.00%	4.00%
Commercial mortgage loans \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	186	211
Total	$ 3,106	$ 3,783
Percent of Total	94.00%	99.00%
Commercial mortgage loans \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	1	1
Total	$ 25	$ 11
Percent of Total	1.00%	0.00%
Commercial mortgage loans \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	3	1
Total	$ 174	$ 42
Percent of Total	5.00%	1.00%
Commercial mortgage loans \| Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 1,087	$ 1,267
Allowance for credit losses	5	9
Commercial mortgage loans \| Apartments \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,087	1,267
Commercial mortgage loans \| Apartments \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Apartments \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Offices
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,108	1,223
Allowance for credit losses	99	75
Commercial mortgage loans \| Offices \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	971	1,212
Commercial mortgage loans \| Offices \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	25	11
Commercial mortgage loans \| Offices \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	112	0
Commercial mortgage loans \| Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Total	432	518
Allowance for credit losses	34	36
Commercial mortgage loans \| Retail \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	370	476
Commercial mortgage loans \| Retail \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Retail \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	62	42
Commercial mortgage loans \| Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	301	460
Allowance for credit losses	11	7
Commercial mortgage loans \| Industrial \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	301	460
Commercial mortgage loans \| Industrial \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Industrial \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Hotel
Financing Receivable, Credit Quality Indicator [Line Items]
Total	258	247
Allowance for credit losses	13	9
Commercial mortgage loans \| Hotel \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	258	247
Commercial mortgage loans \| Hotel \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Hotel \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Others
Financing Receivable, Credit Quality Indicator [Line Items]
Total	119	121
Allowance for credit losses	1	2
Commercial mortgage loans \| Others \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	119	121
Commercial mortgage loans \| Others \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial mortgage loans \| Others \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 0	$ 0